std::numeric_limits<T>::is_exact
|
(until C++11) | |
|
(since C++11) |
The value of std::numeric_limits<T>::is_exact is true for all arithmetic types T that use exact representation.
Standard specializations
T |
value of std::numeric_limits<T>::is_exact |
|---|---|
| /* non-specialized */ | false |
| bool | true |
| char | true |
| signed char | true |
| unsigned char | true |
| wchar_t | true |
| char8_t (since C++20) | true |
| char16_t (since C++11) | true |
| char32_t (since C++11) | true |
| short | true |
| unsigned short | true |
| int | true |
| unsigned int | true |
| long | true |
| unsigned long | true |
| long long (since C++11) | true |
| unsigned long long (since C++11) | true |
| float | false |
| double | false |
| long double | false |
Notes
While all fundamental types T for which std::numeric_limits<T>::is_exact == true are integer types, a library may define exact types that are not integers, e.g. a rational arithmetic type representing fractions.
See also
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[static]
|
identifies integer types (public static member constant) |
|
[static]
|
identifies signed types (public static member constant) |
|
[static]
|
identifies types that represent a finite set of values (public static member constant) |
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